The Social tab B, which formerly contained G+ Community feeds, has now been rearranged to contain a mix of feeds from various social sites, which means there are now only two Social tabs, the reddit one (unchanged) and the updated Social B tab (a mixture of feeds from social pages).
When the feeds died I initially wrote: "Update, 17th Aug 2013: G+ Communities feeds are currently not working; this problem will either be fixed soon (issue logged) or FR feeds will be rearranged (alternate ones added)."
So with the feeds not fixed on 28th August 2013 the rearrangement plan is now implemented.
Below is the original code I was using for G+ Social feeds (B and C) on the Index page, which will be logged here to use if it is ever possible to reinstate the feeds for G+ Communities. I doubt G+ will actually fix the feeds but this is OK. I'm actually becoming fond of the new feeds in Webs E so maybe Google via its in the way guy mentality did me a favour. Despite my fondness for Webs E I'll probably leave some comments in the suggestion box here because a wide variety of feed-options is good.
I've discovered Google+ API product manager Thor Mitchell has commented on the demise of Communities feeds: "We've taken no deliberate action to break this. However that behaviour was always somewhat accidental, and therefore risky to use." So it seems the "accidental" Communities feeds will likely be permanently broken.
<!-- ############ SOCIAL B ########## -->
<div style="float: right; width: 33%;">
<span style="color: #A83847; font-size: 14pt;padding: 8px 12px 6px 12px; border: 1px solid #FFC29C; background: #FFF1C9; border-radius: 5px;"><a title="Social feeds (B) Google+." style="color: #A83847;" href="http://futuristicreader.blogspot.com/p/social-b.html">SOC B (G+)</a></span>
<ol>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/106821025608931269290" target="_blank">Advances Medicine Biol</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/117814474100552114108" target="_blank">3D-Printing</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/107785538899595981479" target="_blank">Machine Learning</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/116461000134682563789" target="_blank">Artificial Intelligence</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/117893615198578558038" target="_blank">Materials Science</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/114187629643697588051" target="_blank">Robots</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/105855100073034742485" target="_blank">New Digital Age</a></li>
</ol>
</div>
<br><br><br><br><br><br><br><br><br><br><br><br>
<!-- ############ SOCIAL C ########## -->
<div style="border-top: 1px dashed red; margin-bottom:35px;"></div>
<div style="float: left; width: 34%;">
<span style="color: #A83847; font-size: 14pt;padding: 8px 12px 6px 12px; border: 1px solid #FFC29C; background: #FFF1C9; border-radius: 5px;"><a title="Social feeds (C) Google+." style="color: #A83847;" href="http://futuristicreader.blogspot.com/p/social-c.html">SOC C (G+)</a></span>
<ol>
<li><a href="http://feeds.feedburner.com/GooglePlusSingularity2045" target="_blank">Singularity 2045</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/101977732649825143628" target="_blank">Accelerating Tech</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/107456712659113245536" target="_blank">Transhumanism+</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/112606284619465498360" target="_blank">Future Tech</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/103722847078238621949" target="_blank">Singularity Thinkers</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/102078132093808335476" target="_blank">Singularity Network</a></li>
<li><a href="http://gplus-to-rss-service.appspot.com/rss/100407327672163356829" target="_blank">Singularity Observatory</a></li>
</ol>
</div>
